| Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonances -> Monitor Keywords |
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  Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonancesThe Patent Description & Claims data below is from USPTO Patent Application 20070257845. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATION AND CLAIM FOR PRIORITY [0001] This application claims priority under 35 U.S.C. .sctn.119(e) from copending Provisional Application Ser. No. 60/744,142 filed on Apr. 3, 2006. BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to the field of antennae for communication, and in particular relates to an integrated antenna design for portable wireless communication devices, which has the built-in capability of increasing the number of users and expanding data transmission by creating new dimensions in coding. Antenna configurations are made compact by specially developed materials of high dielectric constants for this purpose. [0004] 2. Description of Prior Art [0005] As the wireless world expands and portable communication devices such as cell phones, Personal Digital Assistants (PDAs), wireless e-mail devices, etc. become increasingly popular, the industry's focus is toward more efficient ways to add users to the saturated frequency spectrum. Many techniques have been developed to increase cellular capacity by separating signals in frequency and time domain. [0006] Modulation schemes transfer data onto a carrier frequency where it is transmitted to a user who then must demodulate the received signal to acquire the data. The popular spread spectrum modulation ensures a secure form of data transfer with systems such as CDMA, Frequency-Hop MPSK, QPSK, etc. [0007] Current forms of modulation are independent of the type of antenna used. Furthermore, most cell phone antennas are comprised of a simple monopole, which is linearly polarized in the vertical direction. Of the modulation schemes used in cell phone technology today, none incorporate the use of antenna polarization as a parameter in data transfer coding. The present invention advances the concept of two orthogonal antennae in a portable communication device to achieve a new dimension of coding. SUMMARY OF THE INVENTION [0008] Two orthogonally polarized antennas and two isolated transceivers along with a selective mixing mechanism will provide a rate of change of polarization. This rate of change of polarization will define a system of data modulation that can be used alone or in conjunction with current forms of modulation as they are used in portable phone technology today. BRIEF DESCRIPTION OF THE DRAWINGS [0009] FIG. 1 shows how two antennas are fed into two transceivers whose outputs are determined by a processing chip. [0010] FIG. 2 shows two antenna outputs combined through a balun to yield one output fed into a transceiver. [0011] FIG. 3 shows a compact flat antenna having two orthogonal input leads. [0012] FIG. 4 shows an example of a patch antenna with a single input lead. [0013] FIG. 5 is a graph showing characteristics of a patch antenna according to the invention. [0014] FIG. 6 shows a pictorial example of the electric field distribution of the antenna in three dimensions. [0015] FIG. 7 shows a radiation pattern simulation for the addition of the new dimension and the potential of utilization with all existing modulation techniques. [0016] FIG. 8 shows a prototype installed inside a cordless phone showing the use of circuit board with one input lead. The concept can be generalized to a circuit board with orthogonal input leads. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [0017] The two antennas are oriented such that one antenna is orthogonal to the other. In this position, one antenna will receive vertical linear polarization, while the other antenna will receive horizontal linear polarization. This creates two distinct modes of operation. If each antenna has a separate receiver, individual signals are received from each antenna. When a vertically polarized signal is transmitted, the vertically polarized antenna will receive this signal. Because of the reflection from buildings and other large objects in urban areas, the horizontally oriented antenna may receive a small portion of the original signal. However, because each antenna has separate circuitry, the vertical polarization can be chosen and the horizontally polarization ignored, and vice versa. [0018] An equivalent method in describing the polarizations can also be to consider the two circular polarizations, i.e., instead of vertical and horizontal polarizations, right-hand circularly polarized and left-hand circularly polarized signals can be discriminated. [0019] After amplification, the signals from both antennas can be combined with a controlled phase delay. This allows the selection of the component with a specific rate of change of polarization. The rate of change between linear and vertical polarization will define a new dimension of coding. Numerous users can transmit on the same frequency with the same coding scheme in the frequency domain, and the rate of change of polarization will define the individual signals. This modulation scheme will increase the current technologies by a factor of N, where N is limited only by the switching speed, signal stability, and scattering conditions. Continue reading... Full patent description for Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonances Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonances patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonances or other areas of interest. ### Previous Patent Application: Antenna with multiple-band patch and slot structures Next Patent Application: Coupled-fed antenna device Industry Class: Communications: radio wave antennas ### FreshPatents.com Support Thank you for viewing the Compact polarization-sensitive and phase-sensitive antenna with directionality and multi-frequency resonances patent info. IP-related news and info Results in 1.15994 seconds Other interesting Feshpatents.com categories: Computers: Graphics , I/O , Processors , Dyn. Storage , Static Storage , Printers |
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